Cay Horstmann grew up in Northern Germany and attended the Christian-Albrechts-Universität in Kiel, a harbor town at the Baltic sea. He received a M.S. in computer science from Syracuse University and a Ph.D. in mathematics from the University of Michigan in Ann Arbor.
For four years, he was VP and CTO of an Internet startup that went from 3 people in a tiny office to a public company. He now teaches computer science at San Jose State University. Cay has written many books and articles on programming languages and computer science education, including the international bestseller Core Java, with ten editions since 1996. He was named a Java Champion in 2005.
Tagir Valeev is a software developer in JetBrains s.r.o. Currently, he improves the support of Java features in IntelliJ IDEA developing new inspections and intention actions. Tagir is actively interested in static code analysis and when time permits, develops an open source library called StreamEx which enhances standard Java 8 Stream API.
Marharyta is a Software Engineer at Wix and Kyiv Kotlin user group leader. She has experience in different programming languages and paradigms, likes new challenges and enjoys programming! She's also working on making Kotlin one more programming language for JVM at Wix and try to spread the light of Kotlin to other developers. Marharyta is very passionate about knowledge sharing, so she's involved in conferences such as Kotlin NIght Kyiv, Devoxx UA and one of the organizers of Rockstar Night dev club.
Sergey works as Java Performance Engineer at Oracle. His primary goal is making Oracle JVM faster digging into JVM runtime, JIT compilers, class libraries and etc. His favorite area is an interaction of Java with modern hardware.
Graeme Rocher is the creator of several popular Open Source projects including Grails and Micronaut and co-author of "The Definitive Guide to Grails". Graeme currently leads the Grails and Micronaut engineering teams at OCI. Graeme is a member of the Java Champions and 2018 was awarded the Groundbreaker award by Oracle for his work on Open Source.
Designed and developed high-performance systems in NetCracker, Odnoklassniki (mail.ru), Sberbank, lately at NSPK JST (MIR PS operator). Engaged in systems architecture, backend (Java) and even in frontend (ReactJS). Big fan of standard solutions and technology usage even in very non-standard situations. Lector (MIPT), coauthor of study-book and popularizer of cryptography and information security.
Arun Gupta is a Principal Technologist at Amazon Web Services. He is responsible for the Cloud Native Computing Foundation (CNCF) strategy within AWS, and participates at CNCF Board and technical meetings actively. He works with different teams at Amazon to help define their open source strategy. He has built and led developer communities for several years. He has extensive speaking experience in 45+ countries on myriad topics. Gupta also founded the Devoxx4Kids chapter in the US and continues to promote technology education among children. A prolific writer, author of several books, an avid runner, a globe trotter, a Docker Captain, a Java Champion, a JUG leader, he is easily accessible at @arungupta on Twitter.